certSigner := crMetadata[security.CertSigner].GetStringValue()
	_, _, certChainBytes, rootCertBytes := s.ca.GetCAKeyCertBundle().GetAll()
	certOpts := ca.CertOpts{
		SubjectIDs: sans,
		TTL:        time.Duration(request.ValidityDuration) * time.Second,
		ForCA:      false,
		CertSigner: certSigner,
	}
	var signErr error
	var cert []byte
	var respCertChain []string

}

// Sign takes a PEM-encoded CSR and cert opts, and returns a certificate signed by k8s CA.
func (r *KubernetesRA) Sign(csrPEM []byte, certOpts ca.CertOpts) ([]byte, error) {
	_, err := preSign(r.raOpts, csrPEM, certOpts.SubjectIDs, certOpts.TTL, certOpts.ForCA)
	if err != nil {
		return nil, err
	}
	certSigner := certOpts.CertSigner

	return r.kubernetesSign(csrPEM, r.raOpts.CaCertFile, certSigner, certOpts.TTL)
}